There are few people who've had as much of an impact on wildlife conservation as Steve Irwin. The reality TV star dedicated his life to protecting nature long before many Americans had heard the word "crikey."
Irwin passed away in 2006, when he was fatally stabbed by a stingray fish while filming an underwater documentary. He was only 44, and he left behind his wife Terri and two kids.
To honor Irwin's 57th birthday, Google has changed its Doodle to a series of illustrations highlighting his life.